Tuber cinereum

Brain: Tuber cinereum
Base of brain. (Tuber cinerum visible at center.)
Gray's	subject #189 813
NeuroNames	hier-376
MeSH	Tuber+cinereum
Dorlands/Elsevier	t_21/12827470

Overview

The tuber cinereum is a hollow eminence of gray matter situated between the mammilary bodies, behind, and the optic chiasma, in front. The tuber cinereum is part of the hypothalamus.

Structure

Laterally it is continuous with the anterior perforated substances and anteriorly with a thin lamina, the lamina terminalis.

The infundibulum, a hollow conical process, projects from the tuber cinereum. The infundibulum extends forward and down where it is attached to the posterior lobe of the pituitary gland.

It houses the nuclei:

• tuberal nucleus
• tuberomamillary nucleus

Tuberomamillary nucleus

The tuberomammillary nucleus (TMN) is the sole source of histamine in the brain.

Function

Circadian rhythm

By its release of histamine, the tuberomamillary nucleus of the tuber cinereum regulates the circadian cycle.

See also

• hypothalamus

Additional images

• 

  Mesal aspect of a brain sectioned in the median sagittal plane.

• 

  The fornix and corpus callosum from below.

References

This article was originally based on an entry from a public domain edition of Gray's Anatomy. As such, some of the information contained herein may be outdated. Please edit the article if this is the case, and feel free to remove this notice when it is no longer relevant.

External links

• Atlas of anatomy at UMich n1a8p1 - "Interpeduncular fossa" (#4)